Machine for operating upon the heel-portions of shoes



Nov. 2', 1937. F. L. BRANDT 2,097,558

MACHINE FOR OPERATING UPON THE HEEL PORTIONS OF SHOES Filed nec. so, 1955 Figi. 54

Patented Nov. 2, 1937 UNITED s'rfrEs OPERATING :UPON THE MACHINE `Eon PATEN T l,orvif-vgic-AE I HEEL-PORTIONS OF SHOES Francis L. Brandt, Wakefield, Mass., assigner to United Shoe Machinery Corporation, Pater-A son, N. J., a corporation of New Jersey s Application December 30, 1935,"7Serial No. 56,733

23 Claims.

a shoe into an attached heel for the insertion"V permanent screw. My invention has as an object the accomplishment of such an end in an effective manner, by simple means convenient for the operator to use. 'I'his object is attained by associating with a rotatable tool, as a drill by which a screw-receiving opening is formed in the work, or a screw-driver by which a threaded fastening is inserted, a member which may engage the work and support and guide it, said `member being movable along the tool. This member preferably surrounds the tool and has a transverse contour substantially that of the interior of the counter-portion of a shoe-upper or of the heel-portion of a last. A shoe olf the last may be applied to such a work-engaging member and, because of the form of the member, may be positioned by contact with it both longitudinally and laterally of the shoe and, also, toward and from the tool to receive the action thereof. Since the engaging member normally surrounds the tool, the operator isV protected against injury by contact with it, and the tool itself is less liable to be broken. Then, upon the applicationof the work, the member yields, as against a spring, to permit the tool-operation to be performed. To avoid accidental displacement of the engaging, positioning and protecting member, it may be locked normally in its inactive relation by a member movable upon it, this member being released by contact of the work. -To determine the point at which the tool is to act, means is preferably provided for varying the relation of the work to it. In the present instance, this means is shown as a screw which is threaded through the locking member and which contacts with the work. By adjustment of this screw or other positioning means, the shoe may be shifted lengthwise of the sole to bring different points into registration with the tool. If desired, a clearing device for a drill-flute may be associated with the engaging member, and I have also provided for the vattachment of a cou'ntersink to the drill, this countersink having a chip-disposing groove.` In the particular form of the invention which I haverchosenrto illustrate, a drill rotates withinY a tube extending 5 n nished bya -slice-enteringblock, is -movable lon-V gitudinally'of the` tube. Preferably, a 'springy surrounds the tube between the support and.V

block, and there is a lever for locking the block against movement tending to compress the spring as the work is presented to the drill. To allow the block to be removed 'and replaced read ily, as when a change of size is desirablea latch retainsgthe blockseparably upon the support.

In the 'accompanying drawing, illustrating a particular embodiment ofthe invention,

Fig. 1 shows it in side elevation, with the more Vessential elements sectioned upon a centraL'vertical plane; l Fig. 2 is a partial view similar in character, with the elements as related at the completion of a drilling operation, and withy a vcountersink. inplaceV upon the drill;

Fig. 3 is a partial end elevation looking from the right in Fig. l, and Y Fig. 4. is a vertical, sectional detail illustratin aV chip-clearing device for the drill.

Upon a base-plate YIII a motor I2 is mounted, .Y

the shaft ofthismotor having secured Vto it a `V chuck I4 xed in place by a set-screw I6. ,In this chuck, a drill I8Iis held by av set-screw 20, thereV being a substantial'space between the opposedj ends of the drill andmotor-shaft, so said drill may be Aadjusted longitudinally of its axis to provideffor boring to different depths, as will later appear. Rising4 from the base below the. motor-shaft isan upwardly andoutwardly inclined bracket 22 furnishing a support for the elementspeculiar to the present invention.

Fixed in thebracket and surrounding the drill.l for a part of its length is a horizontal tube 24, which providesl an auxiliary supporting portionV of thebraclszet.V OutsideY this tubeandthe' drill and movable alongthem is a 'block 26,.wli ich,

upon engagement by the work, serves to position;v it'initially with relation to the drill and tosupportl and guide it during the boring operation. This block, considered transversely'of its outer work-engaging end, has substantially the contour of .the heel-end of a last; that is, its sidewalls are complemental to the counter-portionl of a shoe and its end-wall to the heel-seat-pors tion of the insole.V Theblock may haveV itsside corresponding generally to theV breast-line, facfrom `.a support, and the engagingV membenfur; fi

depth of drilling being eiected by the setting of the tool in the chuck I4, as previouslydescribed. At 3S, the block is normally restrained againstV movement of separation from the support by a llatch 38, sliding vertically in said support and urged into the path of theblock bya spring 40. By raising the latch, the block may readily be removed from the machine and replaced by another, as when it is desired to obtain closer conformity with sizes of shoes being operated upon.

Within the block-tube l23, and therefore within the support-tube 24 and the .block itself, is a passage 42 through which the drill I8 passes, contact of the block with the latch ,38 locating the point of the drill, in .its inactive relation, about in the plane of the end-wall o f the block.` An outwardly tapered throat .44 at the end-of the passage 42 about the end of the drill facilitates the discharge of thechipswhich are produced. In the normal position, as appears in Fig. l, in which the block with its tube v23 andthe supporttube 24 entirely .surround the vrotating drill and prevent Ainjury by or toit, said block is yieldably held against the latch .A38 by a helical spring 4B encircling the two tubes and abutting at its ends upon the support and the block. Accidental inward displacement of the block when no work is upon it, which would leave the end of the drill unprotected, is prevented by a locking member in the form of a lever 48 fulcrumed at the lower d side of the block ZBbetween spacedwalls and having an inner v.end-surface 50 engaging 4the support. The opposite Aouter .extremity of Vthe locking lever extends below ,the block, so, when a shoe is applied for the drilling operation, the rear of its counter-portion will .swing the lever upwardly against a spring-plunger .52, which urges it into locking position, this contact with the work freeing the surface 50 of the lever from the support. The block may now be forced along the drill to produce the desired bore. To alter the point .of entrance of the Adrill into the-insole longitudinally of the shoe, as may be desirable for certain changes of size, the lever 48 may have threaded in a substantially vertical vdirection in its outer end a screw l.54,'the head of which will receive contact of the rear ofthe counter-portion of an applied shoe. By .causing this screw to project for different distances from the lever, the position of the workmay be determined variably. The portion of the lever through which the screw passes is shown as divided at 56 to give a binding eil'ect .and thus hold it against chance displacement.

In using the machine,.it may be assumed that the work consists oila .shoe S from which the last has been removed and which has a heel I-I attached, as by nails N .or by an'interrnediate layer of an adhesive, or by bothoi .these securing means.v A drill I8 ofthe proper diameter is set in the chuck I4 at a point which will penetrate the heel-seat of the shoe and enter the heel to the chosen depth when vthe block 26 is in contact with the support-surface 34. Taking a shoe .withthe heel-end down,` the operator applies it to the blockrthe sides of which engage the counter-portion to position it laterally so the point of the drill is approximately opposite the center line of the shoe. Pressing upwardly, the locking lever 48 is released by the engagement of the shoe, which, at the same time, determines the relation of the shoe longitudinally in accordance withth'e setting of the screwll. jWiththe work thus located, inward pressure upon itcompresses the spring 46 and causes the constantly rotating drill to act upon the work. The operator there- -lupon withdraws the work, and the block is returned'to its initial position by the spring and locked by the now released lever 4S. The chips produced may gather to some extent in the throat 44, to be freed when the work is removed, while some may enter the passage 42, traveling along the ample yspace which this provides and being discharged at the rear of the support-tube 24. If it is found that clogging of the drill occurs, the flute may be cleared bythe device, illustrated in Fig. 4. Here, a cylindrical member .66 Sur-V. rounds the drill within the outeri end offthe tubef 28 and has ahelical projection 5.2 entering the drill-iiute. Since the clearing.mernberis connected to `the drill only by the entrance o f .the projection into the flute, it may be moved freely in an axial directionand thus applied orremoved, without disturbing the drill or. Ithe. block 26; :Anl internal shoulder 64 upon the tube'preventsin` ward travel ofthe member Si? along the drill. With this arrangement, as soon as theimaterial cut from the work by the drillenters the flute, it tends to travel Valong this rearwardly, but is removed by the projectionV 62 and falls upon the throat '44 to .be discharged.

vThe countersinking offthe .entrance offthe drilled opening through`V the insolefmaybe ef-Q fected simultaneously 'with the drilling. ForA this purpose, I have shown in Fig.' 2 a cylinder.

65 having an axial passage to receive thefdrill and secured thereto by a set-screw 68. 'I'h`e ou' .'t -.y er extremity of the cylinder is inclinedand. is

point at which the cylinder isv attached Vto the drill is such that when said drill hasv entered' the work to the yproper depth, the countersink in' provided `with .countersinking teeth '153..

the insole will have been produced by the teeth. To prevent clogging .by the accumulated chips between the cylinder 66 and the inner wall of the tube 28, va helical groove 'I2 maybe formed in the cylinder extending between its ends, this urging back the chips 4into the portion of the passage, which is of suicient width to carry them freely. Y

Having described my invention, what-I claim as new and desire to secure by Letters Patent ranged to receive about it the counter-portion of a shoe with the rear of said counter-portion resting against and positioned -by the member and the sides of the counter-portion limited by it as to lateral displacement to locate the heelseat-surface of the shoe in a predetermined relation to the tool, said lmember being yieldable along the tool under the influence of the posi` tioned work.

2. In a machine for operating upon the heelportions of shoes, a rotatable tool, anda workengaging member forming apart of vthe machine and associated with the tool., said member hav-4 ing` substantially Ythe transverseY contourVV of the interior counter-portion oi a shoe-upperand being movable along the tool under the iniluence engag'ing member forming a part of the machineand having substantially the'transverse' contour of the interior counter-portion of a shoe-upper, said member normally surrounding the tool and being movable along said tool under theinuence of the Work.

4. In a machine for operating upon the heelportions of shoes, a rotatable drill, and a workengaging member forming a part of the machine and surrounding the drill, said member having substantially the transverse contour of the interior counter-portion of a. shoe-upper and normally surrounding the drill and being movable along said drill under the influence of the work.

5. In a machine for operating upon the heelportions of shoes, a rotatable tool, and a Workengaging member forming a part of the machine and associated with the tool, said member having side-walls corresponding in contour to the'interior counter-portion of a shoe-upper and an end-Wall arranged for contact with the heelseat-portion of the insole, the member being movable along the tool by the contact of a shoe with the end-Wall.

6. In a machine for operating upon the heelporticns of shoes, a rotatable tool, a member movable along the tool by engagement with the work, and means movable upon the member for locking said member against movement.

7. In a machine for operating upon the heelportions of shoes, a rotatable tool, a Work-engaging member corresponding in shape to the heel-portion of a last, said member being movable along the tool, and a member for locking the last-shaped engaging member against movement, such locking member being movable upon the engaging member.

8. In a machine for operating upon the heelportions of shoes, a rotatable tool, a work-engaging member corresponding in shape to the heel-portion of a last, said member being movable along the tool, and a locking lever fulcrumed upon the engaging member and releasable by contact with the counter-portion of a shoe being operated upon.

9. In a machine for operating upon the heelportions of shoes, a rotatable tool, a work-engaging member corresponding in shape to the heel-portion of a last, said member being movable along the tool, and means movable upon the member for varying the relation of the applied Work to the tool. Y

10. In a machine for operating upon'the heelportions of shoes, a rotatable tool, a member movable along the tool by engagement with the work, means movable upon the member for locking said member against movement, and means movable upon the locking means for varying the relation of the engaged work to the tool.

11. In a machine for operating upon the heelportions of shoes, a rotatable tool, Va work-engaging member corresponding in shape to the heelportion of a last, said member being movable along the tool, a locking lever fulcrumed upon the engaging member, and a screw threaded into the lever and arranged for contact with the work.

12. In a machine for operating upon the heelengaging'member forming ap'artof the-'machine and movable along the drill',fsaid member havingy side-Walls corresponding in contour tothe inte-- rior counter-portionV of a shoe-upper and ari-end'- wall arranged for Contact With'the heel-seat-` portion of the insole, the member having` apas, sage opening through the end-wall and through which the drill passes. Y Y

13. Ina machine for operating upon the heelportions of shoes; a'rotatable drill, a Work-em'- gaging member movable along the drill and having Vside-Walls corresponding in contour Vto the interior counter-portion of a shoe-upper and an end-wall arranged for contact with` the heelseat-portion of the insole, said member having a passage opening through Vthe end-wall and through which the drill passes, and a countersink secured to thedrill within the passage.

14. In a machine for operating upon the heelportionsof shoes, a rotatable drill,4a work-engaging member movable along the drill and having side-walls corresponding in contour to the interior counter-portion of a shoe-upper and an end-wall arranged' for contact with the heel-seatportion of the insole, said member. having a pas- Yportions'of shoes, a rotatable drillfandla4 worksage opening through Vthe end-wall and through ,i

which the drill passes, and a counter-sink having a. cylindrical body secured to the drill and in which is a helical grove extending between the ends of the body, said countersink being arranged to operate in the passage in the member with the groove delivering chips to said passage.

15. In a machine for operating upon the heelportions of shoes, a rotatable drill, a work-engaging member surrounding the drill, and a clearing device for thedrill, said device being free to move longitudinally of the drill within the work-engaging member.

16. In a drilling machine for shoes, a support,

the tube'and interposed between the support and block, and a member for locking the block against spring-compressing movement, said member being movable upon the block for contact with the support.

, 19. In a drilling machine for shoes, a support, a tube extending from the support, a drill rotatable in the tube, a shoe-entering block movable longitudinally of the tube, a spring surrounding the Vtube and interposed between the support and block, a member for locking 'the block4 against spring-compressing movement, said member being movable upon the block for contact with the support, and a shoe-engaging screw threaded into the locking member. Y

20. In a drilling machine for shoes, a support,

a tube extending from the SuppQrt, a drill movable in the tube, and a shoe-entering block guided upon the support for movement longitudinally 'of thedrill and having a tube Yextending within'the support-tube.

21. In a drillingmaohine for shoes, a support,V

entering block guided upon the support for movement longitudinally of the drill and having a tube extending within the support-tube, and a clearing device carried in the block-tube and acting upon a ilute of the drill.

23. In a drilling machine for shoes, a support,

a rotatable drill extending through the support, A a shoe-entering block yieldable upon the supportv longitudinally of the drill, and a latch for separably retaining 4the block upon said support.

FRANCIS L. BRANDT. 

